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DKGJ type mounting connection dimensions

DKGJ type mounting connection dimensions apply to the ball screw & rolling spline composite unit, an innovative integrated rolling functional component tailored for automated and intelligent production lines. This integrated unit combines rotary and linear motion capabilities, assembled from a hollow screw spline shaft, ball nut rolling bearing assembly, spline sleeve rolling bearing composite unit and other core parts. It is extensively adopted for combined rotary-linear mechanical systems including the Z-axis of SCARA horizontal multi-joint robots, dispensers, welding machines, automatic loaders, automatic inspection equipment and machining center ATC automatic tool change structures.

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Model:
DKGJ series
Brand:
NANJING GONGYI

Ball Screw Rolling Spline Compound Unit Rolled Ball Screw Ball screw spline GJAIIZ Roll Spline Subdimension Series

Product Description

DKG(J) Ball Screw Rolling Spline Compound Unit

Product Core Advantages

The ball screw rolling spline composite unit corresponding to DKGJ mounting connection dimensions integrates ball screw linear feed and rolling spline torque transmission into a single compact assembly. It can realize synchronous or independent linear movement and rotary motion on one shaft, greatly simplifying the overall mechanical structure and reducing equipment installation space. Adopting a hollow screw spline shaft design, the unit supports wiring or air passage layout through the shaft center to further optimize equipment layout. With integrated rolling bearing composite structures for both the ball nut and spline sleeve, it achieves low friction, smooth operation, high positioning accuracy and reliable torque output. The unified DKGJ standard mounting connection dimensions enable convenient standardized installation and interchangeability, shortening equipment assembly and debugging cycles for system integrators.

Wide Application Scenarios

Matching DKGJ type mounting specifications, this ball screw rolling spline composite unit serves as a core motion component for equipment requiring combined rotary and linear motion. Typical applications include Z-axis motion of SCARA horizontal multi-joint robots, automatic dispensing equipment, automated welding machinery, automatic loading and unloading devices, precision automatic testing instruments, as well as ATC automatic tool change modules of machining centers. It is also suitable for various customized intelligent automation production lines that demand integrated rotary-linear motion control.

Professional R&D and Technical Strength

This composite rolling functional unit is independently developed targeting the evolving demands of automated and intelligent production lines. The engineering team optimizes the integrated structure of hollow screw spline shafts and dual rolling bearing composite assemblies, while formulating unified DKGJ type mounting connection dimension standards to ensure structural compatibility and interchangeability. Strict performance tests including positioning accuracy, repeated motion stability, torque and load verification are conducted for finished units. Dimensional inspection of DKGJ mounting interfaces is implemented batch by batch to guarantee consistent installation matching. Customized adjustment of mounting dimensions and motion parameters can be provided to meet special mechanical design requirements.

Advanced Processing Technology & Efficient Delivery

Key components such as the hollow screw spline shaft are manufactured with precision grinding and forming processes to ensure high thread and spline profile accuracy. The ball nut and spline sleeve rolling bearing composite units are assembled and preloaded under precise process control to maintain stable rolling performance. All products are inspected against DKGJ standard mounting connection dimensions before delivery to ensure interchangeability. Standard models are arranged with standardized production schedules for steady supply. Strict finished-product inspection and standardized packaging are implemented to deliver qualified integrated motion units to global automation customers.

Features

● Spline shaft for shaft end structure requirements

The ball screw spiral raceway and rolling spline (straight) raceway are cross-designed on the same shaft, and the ball nut and spline sleeve are respectively integrated with the rolling bearing height. Through the rotation or stop of the ball nut and spline sleeve, the screw spline shaft can be rotated, straight and spiral in 3 forms of compound movement.

● Lightweight, low inertia

Lead screw spline shaft adopts hollow design, the overall weight is light；The ball nut and spline sleeve are integrated with the bearing design, making the radial size of the ball nut rolling bearing compound unit and the spline sleeve rolling bearing compound unit small enough and the moment of inertia extremely low.

● High speed, low noise

Ball screw selection of large lead design, coupled with the rotating unit moment of inertia is very low, low noise at high speed movement.

● Easy to install

The two ends of the ball nut rolling bearing composite unit and spline sleeve rolling bearing composite unit are provided with standard driving pulley connecting parts, which is convenient for user selection and easy installation.

The principle of movement

● Basic principle of DKGJ

Output motion diagram	Input (drive pulley)		Output (screw spline shaft movement)
Output motion diagram	Rolling nut end drive pulley nl	Spline sleeve end drive belt nh	Straight line motion up and down (Z) direction	Rotational motion in positive and negative (C) directions
Motion form one:linear motion	Forward set	non-rotation	Downward motion Velocity value=nl×Ph	non-rotation
Motion form one:linear motion	reversal	non-rotation	Upward motion Velocity value=-nl×Ph	non-rotation
Motion form two:rotational motion	Forward set	Forward set 且nh=nl	No exercise	Forward set Revolution value=nh
Motion form two:rotational motion	reversal	reversal 且nh=nl	No exercise	reversal Revolution value=-nh
Movement form three:spiral movement	non-rotation	Forward set	Upward motion Velocity value=nh×Ph	Forward set Revolution value=nh
Movement form three:spiral movement	non-rotation	reversal	Downward motion Velocity value=-nh×Ph	reversal Revolution value=-nh

Note:The Ph in the table is the lead of the ball screw,and the screw rotation is left

DKGJ Type Mounting Connection Dimensions

Ball screw part											Unit: mm
Specification code	Hollow screw spline shaft part dimensions																							Specification code
	Nominal diameter d₀	Nominal leads Pn	Lead screw outside diameter d₁	Total number of cycles	Screw base diameter d₂	D	D₁ g6	L₁	D₂	D₃	D₄ h7	P₁	P₂	B₁	B₂	B₃	M₁	D₉	t₁	Basic load rating oflead screw		Basic load rating of support shaft
	Nominal diameter d₀	Nominal leads Pn	Lead screw outside diameter d₁	Total number of cycles	Screw base diameter d₂	D	D₁ g6	L₁	D₂	D₃	D₄ h7	P₁	P₂	B₁	B₂	B₃	M₁	D₉	t₁	Dynamic load (kN)	Static load (kN)	Dynamic load (kN)	Static load (kN)
DKGJ1616	16	16	16	1.8	13.7	11	48	45	35	64	36	56	25	6	21	10	4	4.5	14	5.2	8.3	6.5	9.3	DKGJ1616
DKGJ2020	20	20	20	1.8	17.4	14	56	52	39	72	43.5	64	31	6	21	11	5	4.5	18	7.0	12.0	7.1	12	DKGJ2020
DKGJ2525	25	25	25	1.8	22	18	66	66	50	86	52	75	38	7	25	13	6	5.5	18	10.4	18.8	10.3	18.5	DKGJ2525
DKGJ3232	32	32	32	1.8	28.1	23	78	78	58	702	63	89	48	8	25	14	6	6.6	16	14.8	28.4	11.3	22.9	DKGJ3232

Scroll the spline section												Unit: mm
Specification code	Spline sleeve rotation unit part dimensions																			Specification code
	Basic rated torque		D₅ g6	L₂	D₆	D₇	D₈ h7	P₃	Pa	B	B₅	B₆	M₂	Dio	t₂	Basic spline load rating		Basic load rating ofsupport shaft
	Dynamic torque (N ·m)	Static torque (N ·m)	D₅ g6	L₂	D₆	D₇	D₈ h7	P₃	Pa	B	B₅	B₆	M₂	Dio	t₂	Dynamic load (kN)	Static load (kN)	Dynamic load (kN)	Static load (kN)
DKGJ1616	41.6	57.2	48	50	31	64	36	56	30	6	21	10	4	4.5	13	5.2	7.2	6.7	6.4	DKGJ1616
DKGJ2020	68.9	93	56	63	35	72	43.5	64	36	6	21	12	5	4.5	14	7.0	9.4	7.4	7.8	DKGJ2020
DKGJ2525	190	326.8	66	71	42	86	52	75	44	7	25	13	5	5.5	16.3	9.5	13.3	9.7	10.6	DKGJ2525
DKGJ3232	331.3	572	78	80	52	103	63	89	54	8	25	17	6	6.6	18	13.1	18.3	15.2	15.7	DKGJ3232

DKG Type Mounting Connection Dimensions

Ball screw part												Unit: mm
Specification code	Hollow screw spline shaft part dimensions																							Specification code
	Nominal diameter d。	Nominal leads Pm	Lead screw outside diameter d₂	Total number of cycles	Screw base diameter d₂	D	D₂ g6	L₁	D₂	D₃	DA h7	P₁	P₂	B₁	B₂	B₃	M₂	D,	t	Basic load rating of lead screw		Basic load rating of support shaft
	Nominal diameter d。	Nominal leads Pm	Lead screw outside diameter d₂	Total number of cycles	Screw base diameter d₂	D	D₂ g6	L₁	D₂	D₃	DA h7	P₁	P₂	B₁	B₂	B₃	M₂	D,	t	Dynamic load (kN)	Static load (kN)	Dynamic load (kN)	Static load (kN)
DKG1616	16	16	16	1.8	13.7	11	48	45	35	64	36	56	25	6	21	10	4	4.5	14	5.2	8.3	6.5	9.3	DKG1616
DKG2020	20	20	20	1.8	17.4	14	56	52	39	72	43.5	64	31	6	21	11	5	4.5	18	7.0	12.0	7.1	12	DKG2020
DKG2525	25	25	25	1.8	22	18	66	66	58	86	52	75	38	7	25	13	6	5.5	18	10.4	18.8	10.3	18.5	DKG2525
DKG3232	32	32	32	1.8	28.1	23	78	78	60	103	63	89	48	8	25	14	6	6.6	16	14.8	28.4	11.3	22.9	DKG3232

Scroll the spline section								Unit: mm
Specification code	Scroll the spline section														Specification code
	Basic rated torque		D5h6	L2	D6	D7	D8		h	B4	B5	P3	Basic spline load rating
	Dynamic torque	Static torque	D5h6	L2	D6	D7	D8		h	B4	B5	P3	Dynamic torque (kN)	Static torque (kN)
DKG1616	41.6	57.2	31	50	51	8	4.5		6	10	18	40	5.2	7.2	DKG1616
DKG2020	68.9	93	35	56	58	9.5	5.5		5.4	10	18	45	7.0	9.4	DKG2020
DKG2525	190	326.9	42	71	65	9.5	5.5		8	13	26.5	52	9.5	13.3	DKG2525
DKG3232	331.3	572	49	80	77	11	6.6		6.5	13	30	62	13.1	18.3	DKG3232